PhysicsMedium116×since 2002Q7753A particle of mass m and charge q has an initial velocity v→=v0j^\overrightarrow v = {v_0}\widehat jv=v0j . If an electric field E→=E0i^\overrightarrow E = {E_0}\widehat iE=E0i and magnetic field B→=B0i^\overrightarrow B = {B_0}\widehat iB=B0i act on the particle, its speed will double after a time:A3mv0qE0{{3m{v_0}} \over {q{E_0}}}qE03mv0B2mv0qE0{{\sqrt 2 m{v_0}} \over {q{E_0}}}qE02mv0C3mv0qE0{{\sqrt 3 m{v_0}} \over {q{E_0}}}qE03mv0D2mv0qE0{{2m{v_0}} \over {q{E_0}}}qE02mv0Check answerSkip